%0 Thesis
%A Yang, Yewon
%T Measurement of Charm Production in CMS and Total Charm Cross Section with Non-Universal Charm Fragmentation
%N DESY-THESIS-2024-013
%I Universität Hamburg
%V Dissertation
%C Hamburg
%M PUBDB-2024-05764
%M DESY-THESIS-2024-013
%B DESY-THESIS
%P 362
%D 2024
%Z Dissertation, Universität Hamburg, 2024
%X This thesis presents differential and total charm cross section measurements at various centerof-mass energies in pp collisions. For the purpose of measuring the total charm cross section,the D<sup>∗+</sup> differential cross sections are measured at √s = 7, 0.9 and 13 TeV in the CMSdetector by covering the largest possible phase space, resulting in the smallest extrapolation factor ever introduced at the LHC. The measured fiducial cross sections are extrapolated to thetotal cross section using a data-driven parametrization which is introduced for the first time tobe applied to all the weakly-decaying ground states in pp collisions with non-universal charmfragmentation. Also adding other LHC measurements, the total charm-pair cross sections aremeasured at √s = 0.9, 5, 7, and 13 TeV to be 1.83\substack+0.35 −0.37, 8.43\substack+1.055 −1.16, 9.39\substack+1.35 −1.49, and 17.43\substack+2.10 −2.57 mb, respectively. These measurements supersede all the earlier LHC measurements which werederived under the fragmentation universality assumption, and show consistency with NNLOQCD theory predictions. The measurement of the total charm cross section as a function ofthe center-of-mass energy can be used to constrain QCD parameters. The very first exampleis shown to constrain the charm mass and the parton distribution functions particularly in thelow-x region.
%F PUB:(DE-HGF)3 ; PUB:(DE-HGF)11
%9 BookDissertation / PhD Thesis
%R 10.3204/PUBDB-2024-05764
%U https://bib-pubdb1.desy.de/record/614200